Adds secret_token to secret file.
Updates styling of notes and citations.
Updates gems.
Fixes crop/resize and gravity.
Fixes #author_surname.
Fixes captions, descriptions, credits.

Since we're reading straight from Evernote data we use <div> and </div>
rather than ^ and $ as line delimiters. If we end up using a sanitized
version of the body for other uses (e.g. wordcount), then we can use
that.
Updates styling colours.
Minor mark-up fixes.